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Add per-layer scaling unrelated to texture size

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shylie 2025-08-29 14:15:18 -04:00
parent 5a14f0da22
commit 7590f0ea62
2 changed files with 34 additions and 21 deletions
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15
zchunk.lua
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@ -61,7 +61,7 @@ end
---@param x integer?
---@param y integer?
function zchunk:remove(x, y)
if not x then
if not x or not y then
self._chunks = {}
else
local index = self:_chunk_index(x, y)
@ -72,7 +72,7 @@ end
---@param x integer?
---@param y integer?
function zchunk:clear(x, y)
if not x then
if not x or not y then
for _, chunk in pairs(self._chunks) do
chunk.z:clear()
end
@ -88,11 +88,12 @@ end
--- Add an 'entity' to be rendered
---@param x number
---@param y number
---@param quad love.Quad
---@param quad love.Quad|fun(layer: integer): love.Quad
---@param layer_count integer
---@param color_map fun(layer: integer): number, number, number
---@param base_layer integer?
function zchunk:put(x, y, quad, layer_count, color_map, base_layer)
---@param color_map (fun(layer: integer): number, number, number, number)?
---@param offset_map (fun(layer: integer): integer, integer)?
---@param scale_map (fun(layer: integer): number)?
function zchunk:put(x, y, quad, layer_count, color_map, offset_map, scale_map)
local index = self:_chunk_index(x, y)
if not self._chunks[index] then
self._chunks[index] = {
@ -100,7 +101,7 @@ function zchunk:put(x, y, quad, layer_count, color_map, base_layer)
}
self._chunks[index].z._height_scale = self._height_scale
end
self._chunks[index].z:put(x, y, quad, layer_count, color_map, base_layer)
self._chunks[index].z:put(x, y, quad, layer_count, color_map, offset_map, scale_map)
self._chunks[index].x = math.floor(x / self._chunk_size)
self._chunks[index].y = math.floor(y / self._chunk_size)
end

40
zprite.lua
View File

@ -30,9 +30,9 @@ vec4 position(mat4 transform_projection, vec4 vertex_position)
uint uv_y = bitfieldExtract(InstanceData.y, 10, 10);
vec2 uv = vec2(uv_x, uv_y) / vec2(1024, 1024);
uint scale_x = bitfieldExtract(InstanceData.y, 20, 6);
uint scale_y = bitfieldExtract(InstanceData.y, 26, 6);
vec2 scale = vec2(scale_x, scale_y);
uint tex_scale_x = bitfieldExtract(InstanceData.y, 20, 6);
uint tex_scale_y = bitfieldExtract(InstanceData.y, 26, 6);
vec2 tex_scale = vec2(tex_scale_x, tex_scale_y);
uint r = bitfieldExtract(InstanceData.z, 0, 8);
uint g = bitfieldExtract(InstanceData.z, 8, 8);
@ -45,11 +45,15 @@ vec4 position(mat4 transform_projection, vec4 vertex_position)
uint offset_y = bitfieldExtract(InstanceData.w, 16, 8);
vec2 offset = (vec2(offset_x, offset_y) / vec2(128, 128)) - vec2(1, 1);
uint scale_xy = bitfieldExtract(InstanceData.w, 24, 8);
float scale = 1 + float(scale_xy) / 64.0;
vec2 pixel_offset = offset * vec2(layer * HeightScale, layer * HeightScale) / love_ScreenSize.xy;
vertex_position.xy *= scale;
vertex_position.xy *= tex_scale;
vertex_position.xy *= vec2(scale);
vertex_position.xy += position;
VaryingTexCoord.xy *= scale;
VaryingTexCoord.xy *= tex_scale;
VaryingTexCoord.xy += uv;
VsColorOut = color;
return (transform_projection * vertex_position) + vec4(pixel_offset, 0, 0);
@ -73,6 +77,10 @@ local function ZPRITE_DEFAULT_OFFSETMAP(_)
return 0, 2
end
local function ZPRITE_DEFAULT_SCALEMAP(_)
return 0
end
---@param texture love.Image
---@param max_instances integer?
function zprite.new(texture, max_instances)
@ -112,13 +120,15 @@ end
---@param layer_count integer
---@param color_map (fun(layer: integer): number, number, number, number)?
---@param offset_map (fun(layer: integer): integer, integer)?
function zprite:put(x, y, quad, layer_count, color_map, offset_map)
---@param scale_map (fun(layer: integer): number)?
function zprite:put(x, y, quad, layer_count, color_map, offset_map, scale_map)
if #self._instances + layer_count > self._instance_vertex_count then
return
end
color_map = color_map and color_map or ZPRITE_DEFAULT_COLORMAP
offset_map = offset_map and offset_map or ZPRITE_DEFAULT_OFFSETMAP
color_map = color_map or ZPRITE_DEFAULT_COLORMAP
offset_map = offset_map or ZPRITE_DEFAULT_OFFSETMAP
scale_map = scale_map or ZPRITE_DEFAULT_SCALEMAP
self._changed = true
@ -173,11 +183,11 @@ function zprite:put(x, y, quad, layer_count, color_map, offset_map)
local uv_y = bit.lshift(bit.band(1024 * qy / th, 0x3FF), 10)
local uv = bit.bor(uv_x, uv_y)
local scale_x = bit.lshift(bit.band(qw, 0x3F), 20)
local scale_y = bit.lshift(bit.band(qh, 0x3F), 26)
local scale = bit.bor(scale_x, scale_y)
local tex_scale_x = bit.lshift(bit.band(qw, 0x3F), 20)
local tex_scale_y = bit.lshift(bit.band(qh, 0x3F), 26)
local tex_scale = bit.bor(tex_scale_x, tex_scale_y)
local uv_scale = bit.bor(uv, scale)
local uv_scale = bit.bor(uv, tex_scale)
local offset_x, offset_y = offset_map(i)
local offset_x_b = bit.lshift(bit.band((offset_x + 1) / 2 * 0xFF, 0xFF), 8)
@ -185,12 +195,14 @@ function zprite:put(x, y, quad, layer_count, color_map, offset_map)
local layer = bit.band(i, 0xFF)
local layer_offset = bit.bor(layer, offset_x_b, offset_y_b)
local scale = bit.lshift(bit.band(math.floor(scale_map(i) * 127.5), 0xFF), 24)
local layer_offset_scale = bit.bor(layer, offset_x_b, offset_y_b, scale)
table.insert(self._instances[i], pos)
table.insert(self._instances[i], uv_scale)
table.insert(self._instances[i], rgba)
table.insert(self._instances[i], layer_offset)
table.insert(self._instances[i], layer_offset_scale)
end
end